Comments on: LED Puck: Need an Inexpensive Accelerometer

By: Keith Neufeld

Keith Neufeld — Thu, 27 Dec 2007 16:39:13 +0000

Ms Jaye, sorry to be so slow in responding to your question about case versus resin. Partly I've been busy with the holiday break, but partly I wanted to take the time to give you as thorough an answer as possible. I think it comes down to this:

I'm personally much more interested in milling an enclosure than in making a form and casting one. Working with resin just doesn't appeal to me.
I don't know whether any will actually do it, but I think other people are potentially interested in making pucks, and I think it'd be easier for them to do with a milled case also.
And not least, I'd like the circuit board to be removable for repair and/or enhancement. I think that'd be next to impossible to do with resin.

But . . . there's nothing to stop you from assembling puck guts and casting them in resin, if you were interested. If you do, I'd love to see how it comes out!

By: Keith Neufeld

Keith Neufeld — Thu, 20 Dec 2007 11:38:19 +0000

Calle — I know I can sample chips, and I am already using samples in my prototype. But I want to find inexpensive parts for the puck so that other people, who can’t all be expected to sample all of their parts, can afford to build one too.

By: Calle

Calle — Thu, 20 Dec 2007 11:18:07 +0000

You can sample accelerometers from freescale… Delivery in 2-3 days…
I really like the MMA7260QT because it lets you chose from between 1.5g/2g/4g/6g using two pins…

By: MsJaye

MsJaye — Thu, 20 Dec 2007 06:42:16 +0000

Alas, I’m afraid not. The accelerometer I’ve been using is the LIS3L02AS4 that Digikey sell; I suspect it’s the one you’ve been looking at.

I’m curious — why have you settled on a case rather than the joy of messing about with resin?